https://github.com/torvalds/linux
Tip revision: 84a1caf1453c3d44050bd22db958af4a7f99315c authored by Linus Torvalds on 14 July 2012, 22:40:28 UTC
Linux 3.5-rc7
Linux 3.5-rc7
Tip revision: 84a1caf
es7000_32.c
/*
* Written by: Garry Forsgren, Unisys Corporation
* Natalie Protasevich, Unisys Corporation
*
* This file contains the code to configure and interface
* with Unisys ES7000 series hardware system manager.
*
* Copyright (c) 2003 Unisys Corporation.
* Copyright (C) 2009, Red Hat, Inc., Ingo Molnar
*
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Unisys Corporation, Township Line & Union Meeting
* Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
*
* http://www.unisys.com
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/notifier.h>
#include <linux/spinlock.h>
#include <linux/cpumask.h>
#include <linux/threads.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/reboot.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/init.h>
#include <linux/gfp.h>
#include <linux/nmi.h>
#include <linux/smp.h>
#include <linux/io.h>
#include <asm/apicdef.h>
#include <linux/atomic.h>
#include <asm/fixmap.h>
#include <asm/mpspec.h>
#include <asm/setup.h>
#include <asm/apic.h>
#include <asm/ipi.h>
/*
* ES7000 chipsets
*/
#define NON_UNISYS 0
#define ES7000_CLASSIC 1
#define ES7000_ZORRO 2
#define MIP_REG 1
#define MIP_PSAI_REG 4
#define MIP_BUSY 1
#define MIP_SPIN 0xf0000
#define MIP_VALID 0x0100000000000000ULL
#define MIP_SW_APIC 0x1020b
#define MIP_PORT(val) ((val >> 32) & 0xffff)
#define MIP_RD_LO(val) (val & 0xffffffff)
struct mip_reg {
unsigned long long off_0x00;
unsigned long long off_0x08;
unsigned long long off_0x10;
unsigned long long off_0x18;
unsigned long long off_0x20;
unsigned long long off_0x28;
unsigned long long off_0x30;
unsigned long long off_0x38;
};
struct mip_reg_info {
unsigned long long mip_info;
unsigned long long delivery_info;
unsigned long long host_reg;
unsigned long long mip_reg;
};
struct psai {
unsigned long long entry_type;
unsigned long long addr;
unsigned long long bep_addr;
};
#ifdef CONFIG_ACPI
struct es7000_oem_table {
struct acpi_table_header Header;
u32 OEMTableAddr;
u32 OEMTableSize;
};
static unsigned long oem_addrX;
static unsigned long oem_size;
#endif
/*
* ES7000 Globals
*/
static volatile unsigned long *psai;
static struct mip_reg *mip_reg;
static struct mip_reg *host_reg;
static int mip_port;
static unsigned long mip_addr;
static unsigned long host_addr;
int es7000_plat;
/*
* GSI override for ES7000 platforms.
*/
static int __cpuinit wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
{
unsigned long vect = 0, psaival = 0;
if (psai == NULL)
return -1;
vect = ((unsigned long)__pa(eip)/0x1000) << 16;
psaival = (0x1000000 | vect | cpu);
while (*psai & 0x1000000)
;
*psai = psaival;
return 0;
}
static int es7000_apic_is_cluster(void)
{
/* MPENTIUMIII */
if (boot_cpu_data.x86 == 6 &&
(boot_cpu_data.x86_model >= 7 && boot_cpu_data.x86_model <= 11))
return 1;
return 0;
}
static void setup_unisys(void)
{
/*
* Determine the generation of the ES7000 currently running.
*
* es7000_plat = 1 if the machine is a 5xx ES7000 box
* es7000_plat = 2 if the machine is a x86_64 ES7000 box
*
*/
if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
es7000_plat = ES7000_ZORRO;
else
es7000_plat = ES7000_CLASSIC;
}
/*
* Parse the OEM Table:
*/
static int parse_unisys_oem(char *oemptr)
{
int i;
int success = 0;
unsigned char type, size;
unsigned long val;
char *tp = NULL;
struct psai *psaip = NULL;
struct mip_reg_info *mi;
struct mip_reg *host, *mip;
tp = oemptr;
tp += 8;
for (i = 0; i <= 6; i++) {
type = *tp++;
size = *tp++;
tp -= 2;
switch (type) {
case MIP_REG:
mi = (struct mip_reg_info *)tp;
val = MIP_RD_LO(mi->host_reg);
host_addr = val;
host = (struct mip_reg *)val;
host_reg = __va(host);
val = MIP_RD_LO(mi->mip_reg);
mip_port = MIP_PORT(mi->mip_info);
mip_addr = val;
mip = (struct mip_reg *)val;
mip_reg = __va(mip);
pr_debug("host_reg = 0x%lx\n",
(unsigned long)host_reg);
pr_debug("mip_reg = 0x%lx\n",
(unsigned long)mip_reg);
success++;
break;
case MIP_PSAI_REG:
psaip = (struct psai *)tp;
if (tp != NULL) {
if (psaip->addr)
psai = __va(psaip->addr);
else
psai = NULL;
success++;
}
break;
default:
break;
}
tp += size;
}
if (success < 2)
es7000_plat = NON_UNISYS;
else
setup_unisys();
return es7000_plat;
}
#ifdef CONFIG_ACPI
static int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
{
struct acpi_table_header *header = NULL;
struct es7000_oem_table *table;
acpi_size tbl_size;
acpi_status ret;
int i = 0;
for (;;) {
ret = acpi_get_table_with_size("OEM1", i++, &header, &tbl_size);
if (!ACPI_SUCCESS(ret))
return -1;
if (!memcmp((char *) &header->oem_id, "UNISYS", 6))
break;
early_acpi_os_unmap_memory(header, tbl_size);
}
table = (void *)header;
oem_addrX = table->OEMTableAddr;
oem_size = table->OEMTableSize;
early_acpi_os_unmap_memory(header, tbl_size);
*oem_addr = (unsigned long)__acpi_map_table(oem_addrX, oem_size);
return 0;
}
static void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
{
if (!oem_addr)
return;
__acpi_unmap_table((char *)oem_addr, oem_size);
}
static int es7000_check_dsdt(void)
{
struct acpi_table_header header;
if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT, 0, &header)) &&
!strncmp(header.oem_id, "UNISYS", 6))
return 1;
return 0;
}
static int es7000_acpi_ret;
/* Hook from generic ACPI tables.c */
static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
unsigned long oem_addr = 0;
int check_dsdt;
int ret = 0;
/* check dsdt at first to avoid clear fix_map for oem_addr */
check_dsdt = es7000_check_dsdt();
if (!find_unisys_acpi_oem_table(&oem_addr)) {
if (check_dsdt) {
ret = parse_unisys_oem((char *)oem_addr);
} else {
setup_unisys();
ret = 1;
}
/*
* we need to unmap it
*/
unmap_unisys_acpi_oem_table(oem_addr);
}
es7000_acpi_ret = ret;
return ret && !es7000_apic_is_cluster();
}
static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
{
int ret = es7000_acpi_ret;
return ret && es7000_apic_is_cluster();
}
#else /* !CONFIG_ACPI: */
static int es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
return 0;
}
static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
{
return 0;
}
#endif /* !CONFIG_ACPI */
static void es7000_spin(int n)
{
int i = 0;
while (i++ < n)
rep_nop();
}
static int es7000_mip_write(struct mip_reg *mip_reg)
{
int status = 0;
int spin;
spin = MIP_SPIN;
while ((host_reg->off_0x38 & MIP_VALID) != 0) {
if (--spin <= 0) {
WARN(1, "Timeout waiting for Host Valid Flag\n");
return -1;
}
es7000_spin(MIP_SPIN);
}
memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
outb(1, mip_port);
spin = MIP_SPIN;
while ((mip_reg->off_0x38 & MIP_VALID) == 0) {
if (--spin <= 0) {
WARN(1, "Timeout waiting for MIP Valid Flag\n");
return -1;
}
es7000_spin(MIP_SPIN);
}
status = (mip_reg->off_0x00 & 0xffff0000000000ULL) >> 48;
mip_reg->off_0x38 &= ~MIP_VALID;
return status;
}
static void es7000_enable_apic_mode(void)
{
struct mip_reg es7000_mip_reg;
int mip_status;
if (!es7000_plat)
return;
pr_info("Enabling APIC mode.\n");
memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
es7000_mip_reg.off_0x00 = MIP_SW_APIC;
es7000_mip_reg.off_0x38 = MIP_VALID;
while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
WARN(1, "Command failed, status = %x\n", mip_status);
}
static void es7000_vector_allocation_domain(int cpu, struct cpumask *retmask)
{
/* Careful. Some cpus do not strictly honor the set of cpus
* specified in the interrupt destination when using lowest
* priority interrupt delivery mode.
*
* In particular there was a hyperthreading cpu observed to
* deliver interrupts to the wrong hyperthread when only one
* hyperthread was specified in the interrupt desitination.
*/
cpumask_clear(retmask);
cpumask_bits(retmask)[0] = APIC_ALL_CPUS;
}
static void es7000_wait_for_init_deassert(atomic_t *deassert)
{
while (!atomic_read(deassert))
cpu_relax();
}
static unsigned int es7000_get_apic_id(unsigned long x)
{
return (x >> 24) & 0xFF;
}
static void es7000_send_IPI_mask(const struct cpumask *mask, int vector)
{
default_send_IPI_mask_sequence_phys(mask, vector);
}
static void es7000_send_IPI_allbutself(int vector)
{
default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
}
static void es7000_send_IPI_all(int vector)
{
es7000_send_IPI_mask(cpu_online_mask, vector);
}
static int es7000_apic_id_registered(void)
{
return 1;
}
static const struct cpumask *target_cpus_cluster(void)
{
return cpu_all_mask;
}
static const struct cpumask *es7000_target_cpus(void)
{
return cpumask_of(smp_processor_id());
}
static unsigned long es7000_check_apicid_used(physid_mask_t *map, int apicid)
{
return 0;
}
static unsigned long es7000_check_apicid_present(int bit)
{
return physid_isset(bit, phys_cpu_present_map);
}
static int es7000_early_logical_apicid(int cpu)
{
/* on es7000, logical apicid is the same as physical */
return early_per_cpu(x86_bios_cpu_apicid, cpu);
}
static unsigned long calculate_ldr(int cpu)
{
unsigned long id = per_cpu(x86_bios_cpu_apicid, cpu);
return SET_APIC_LOGICAL_ID(id);
}
/*
* Set up the logical destination ID.
*
* Intel recommends to set DFR, LdR and TPR before enabling
* an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
* document number 292116). So here it goes...
*/
static void es7000_init_apic_ldr_cluster(void)
{
unsigned long val;
int cpu = smp_processor_id();
apic_write(APIC_DFR, APIC_DFR_CLUSTER);
val = calculate_ldr(cpu);
apic_write(APIC_LDR, val);
}
static void es7000_init_apic_ldr(void)
{
unsigned long val;
int cpu = smp_processor_id();
apic_write(APIC_DFR, APIC_DFR_FLAT);
val = calculate_ldr(cpu);
apic_write(APIC_LDR, val);
}
static void es7000_setup_apic_routing(void)
{
int apic = per_cpu(x86_bios_cpu_apicid, smp_processor_id());
pr_info("Enabling APIC mode: %s. Using %d I/O APICs, target cpus %lx\n",
(apic_version[apic] == 0x14) ?
"Physical Cluster" : "Logical Cluster",
nr_ioapics, cpumask_bits(es7000_target_cpus())[0]);
}
static int es7000_cpu_present_to_apicid(int mps_cpu)
{
if (!mps_cpu)
return boot_cpu_physical_apicid;
else if (mps_cpu < nr_cpu_ids)
return per_cpu(x86_bios_cpu_apicid, mps_cpu);
else
return BAD_APICID;
}
static int cpu_id;
static void es7000_apicid_to_cpu_present(int phys_apicid, physid_mask_t *retmap)
{
physid_set_mask_of_physid(cpu_id, retmap);
++cpu_id;
}
static void es7000_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
{
/* For clustered we don't have a good way to do this yet - hack */
physids_promote(0xFFL, retmap);
}
static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
{
boot_cpu_physical_apicid = read_apic_id();
return 1;
}
static unsigned int es7000_cpu_mask_to_apicid(const struct cpumask *cpumask)
{
unsigned int round = 0;
int cpu, uninitialized_var(apicid);
/*
* The cpus in the mask must all be on the apic cluster.
*/
for_each_cpu(cpu, cpumask) {
int new_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
WARN(1, "Not a valid mask!");
return BAD_APICID;
}
apicid = new_apicid;
round++;
}
return apicid;
}
static unsigned int
es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask,
const struct cpumask *andmask)
{
int apicid = early_per_cpu(x86_cpu_to_logical_apicid, 0);
cpumask_var_t cpumask;
if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
return apicid;
cpumask_and(cpumask, inmask, andmask);
cpumask_and(cpumask, cpumask, cpu_online_mask);
apicid = es7000_cpu_mask_to_apicid(cpumask);
free_cpumask_var(cpumask);
return apicid;
}
static int es7000_phys_pkg_id(int cpuid_apic, int index_msb)
{
return cpuid_apic >> index_msb;
}
static int probe_es7000(void)
{
/* probed later in mptable/ACPI hooks */
return 0;
}
static int es7000_mps_ret;
static int es7000_mps_oem_check(struct mpc_table *mpc, char *oem,
char *productid)
{
int ret = 0;
if (mpc->oemptr) {
struct mpc_oemtable *oem_table =
(struct mpc_oemtable *)mpc->oemptr;
if (!strncmp(oem, "UNISYS", 6))
ret = parse_unisys_oem((char *)oem_table);
}
es7000_mps_ret = ret;
return ret && !es7000_apic_is_cluster();
}
static int es7000_mps_oem_check_cluster(struct mpc_table *mpc, char *oem,
char *productid)
{
int ret = es7000_mps_ret;
return ret && es7000_apic_is_cluster();
}
/* We've been warned by a false positive warning.Use __refdata to keep calm. */
static struct apic __refdata apic_es7000_cluster = {
.name = "es7000",
.probe = probe_es7000,
.acpi_madt_oem_check = es7000_acpi_madt_oem_check_cluster,
.apic_id_valid = default_apic_id_valid,
.apic_id_registered = es7000_apic_id_registered,
.irq_delivery_mode = dest_LowestPrio,
/* logical delivery broadcast to all procs: */
.irq_dest_mode = 1,
.target_cpus = target_cpus_cluster,
.disable_esr = 1,
.dest_logical = 0,
.check_apicid_used = es7000_check_apicid_used,
.check_apicid_present = es7000_check_apicid_present,
.vector_allocation_domain = es7000_vector_allocation_domain,
.init_apic_ldr = es7000_init_apic_ldr_cluster,
.ioapic_phys_id_map = es7000_ioapic_phys_id_map,
.setup_apic_routing = es7000_setup_apic_routing,
.multi_timer_check = NULL,
.cpu_present_to_apicid = es7000_cpu_present_to_apicid,
.apicid_to_cpu_present = es7000_apicid_to_cpu_present,
.setup_portio_remap = NULL,
.check_phys_apicid_present = es7000_check_phys_apicid_present,
.enable_apic_mode = es7000_enable_apic_mode,
.phys_pkg_id = es7000_phys_pkg_id,
.mps_oem_check = es7000_mps_oem_check_cluster,
.get_apic_id = es7000_get_apic_id,
.set_apic_id = NULL,
.apic_id_mask = 0xFF << 24,
.cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
.cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
.send_IPI_mask = es7000_send_IPI_mask,
.send_IPI_mask_allbutself = NULL,
.send_IPI_allbutself = es7000_send_IPI_allbutself,
.send_IPI_all = es7000_send_IPI_all,
.send_IPI_self = default_send_IPI_self,
.wakeup_secondary_cpu = wakeup_secondary_cpu_via_mip,
.trampoline_phys_low = 0x467,
.trampoline_phys_high = 0x469,
.wait_for_init_deassert = NULL,
/* Nothing to do for most platforms, since cleared by the INIT cycle: */
.smp_callin_clear_local_apic = NULL,
.inquire_remote_apic = default_inquire_remote_apic,
.read = native_apic_mem_read,
.write = native_apic_mem_write,
.eoi_write = native_apic_mem_write,
.icr_read = native_apic_icr_read,
.icr_write = native_apic_icr_write,
.wait_icr_idle = native_apic_wait_icr_idle,
.safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
.x86_32_early_logical_apicid = es7000_early_logical_apicid,
};
static struct apic __refdata apic_es7000 = {
.name = "es7000",
.probe = probe_es7000,
.acpi_madt_oem_check = es7000_acpi_madt_oem_check,
.apic_id_valid = default_apic_id_valid,
.apic_id_registered = es7000_apic_id_registered,
.irq_delivery_mode = dest_Fixed,
/* phys delivery to target CPUs: */
.irq_dest_mode = 0,
.target_cpus = es7000_target_cpus,
.disable_esr = 1,
.dest_logical = 0,
.check_apicid_used = es7000_check_apicid_used,
.check_apicid_present = es7000_check_apicid_present,
.vector_allocation_domain = es7000_vector_allocation_domain,
.init_apic_ldr = es7000_init_apic_ldr,
.ioapic_phys_id_map = es7000_ioapic_phys_id_map,
.setup_apic_routing = es7000_setup_apic_routing,
.multi_timer_check = NULL,
.cpu_present_to_apicid = es7000_cpu_present_to_apicid,
.apicid_to_cpu_present = es7000_apicid_to_cpu_present,
.setup_portio_remap = NULL,
.check_phys_apicid_present = es7000_check_phys_apicid_present,
.enable_apic_mode = es7000_enable_apic_mode,
.phys_pkg_id = es7000_phys_pkg_id,
.mps_oem_check = es7000_mps_oem_check,
.get_apic_id = es7000_get_apic_id,
.set_apic_id = NULL,
.apic_id_mask = 0xFF << 24,
.cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
.cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
.send_IPI_mask = es7000_send_IPI_mask,
.send_IPI_mask_allbutself = NULL,
.send_IPI_allbutself = es7000_send_IPI_allbutself,
.send_IPI_all = es7000_send_IPI_all,
.send_IPI_self = default_send_IPI_self,
.trampoline_phys_low = 0x467,
.trampoline_phys_high = 0x469,
.wait_for_init_deassert = es7000_wait_for_init_deassert,
/* Nothing to do for most platforms, since cleared by the INIT cycle: */
.smp_callin_clear_local_apic = NULL,
.inquire_remote_apic = default_inquire_remote_apic,
.read = native_apic_mem_read,
.write = native_apic_mem_write,
.eoi_write = native_apic_mem_write,
.icr_read = native_apic_icr_read,
.icr_write = native_apic_icr_write,
.wait_icr_idle = native_apic_wait_icr_idle,
.safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
.x86_32_early_logical_apicid = es7000_early_logical_apicid,
};
/*
* Need to check for es7000 followed by es7000_cluster, so this order
* in apic_drivers is important.
*/
apic_drivers(apic_es7000, apic_es7000_cluster);